I only recently got Cats & Dogs because they were on a really good special offer & grabbed Cool Kitchen a while back for the same reason. But honestly, even though I haven't been playing loads, there was enough to keep me going in the base game and had those two not been discounted, I'd still be on base game only.
It probably depends on how you play, but since I focus on families (and the game does now have toddlers) and building random houses, what is there now is plenty for me.
That said, I do enjoy having pets around :D And as others pointed out, the base game now is way different than it was even just a year ago. (watching old YT videos is confusing)
